I have installed “Template Full Width” into my latest opencart 1.5.6. Mine admin panel has got no colours as yours and no buttons. I followed exactly the installation manual – everything else works ok i think but without this i cant save anything

I am following the installation, however when I copy the ADMIN, CATALOG, and IMAGE folders, it tries to owerwrite core files in admin.
I am using multi store opencart therefore i dont think is a good idea overwriting core files as it might affect other templates in my multi store.
I am using 1.5.6.1.